AMD Radeon HD 6990M vs ATI Mobility Radeon HD 4870

VS

AMD Radeon HD 6990M

ATI Mobility Radeon HD 4870

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 6990M and 512MB VRAM Mobility Radeon HD 4870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990M 's Advantages

Released 2 years and 6 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 56.83GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6990M +82%

1.602 TFLOPS

Mobility Radeon HD 4870

0.88 TFLOPS

Radeon HD 6990M

VS

Mobility Radeon HD 4870

Graphics Card

Jul 2011

Release Date

Jan 2009

Vancouver

Generation

M9x

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

888 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

56.83GB/s

Render Config

14

Compute Units

10

-

1120

Shading Units

800

56

TMUs

40

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

22.88 GPixel/s

Pixel Rate

8.800 GPixel/s

40.04 GTexel/s

Texture Rate

22.00 GTexel/s

-

1.602 TFLOPS

FP32 (float)

880.0 GFLOPS

-

FP64 (double)

176.0 GFLOPS

Board Design

100W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

None

Graphics Processor

Blackcomb

GPU Name

M98

Blackcomb XTX (216-0811030)

GPU Variant

M98 XT L2 (216-0732023)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.956 billion

212 mm²

Die Size

256 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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